title: Crystal growth on bioactive glass sputter-coated alumina in artificial saliva.
abstract: In this work, a bioactive glass was deposited on the alumina disk specimens by radio-frequency magnetron sputtering to study crystal formation ability in artificial saliva. Bioactive glass-coated specimens were immersed in artificial saliva for 1 week and 6 months. The specimens were observed with a scanning electron microscope (SEM) and the composition was determined by energy dispersive spectroscopy (EDS). The crystals that formed on the specimens were analyzed by Raman spectroscopic analysis and Micro-X-ray diffraction. SEM photomicrographs showed the formation of needle-like structures after immersion for 1 week, and tabular structures formed on the surface of the specimen for 6 months. EDS showed that both the needle-like and tabular structures were enriched with Ca and P. Raman and Micro-XRD spectra for the tabular structure showed peaks that may correspond to calcium phosphate. Thus, when immersed in artificial saliva, bioactive glass-coated alumina produced a crystal which might be calcium phosphate.
authors.affiliation: Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Iijima
authors.forename: Masanori
authors.initials: M
authors.lastname: Hashimoto
authors.forename: Naohisa
authors.initials: N
authors.lastname: Kohda
authors.forename: Susumu
authors.initials: S
authors.lastname: Nakagaki
authors.forename: Takeshi
authors.initials: T
authors.lastname: Muguruma
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Endo
authors.forename: Itaru
authors.initials: I
authors.lastname: Mizoguchi
mesh_terms: D000537:Aluminum Oxide; D001672:Biocompatible Materials; D003460:Crystallization; D018360:Crystallography, X-Ray; D005898:Glass; D008855:Microscopy, Electron, Scanning; D012463:Saliva; D013059:Spectrum Analysis, Raman
chemical_list: D001672:Biocompatible Materials; D000537:Aluminum Oxide